Investors love to employ rules to help them predict outcomes. For example, there is a one percent rule (a one percent increase in interest rates equates to ten percent less you can borrow to keep the same payment) and a two percent rule (the percentage of a home’s cost that you should be asking for in monthly rent) and more. Some of these rules can help estimate potential results, but others are outdated or possibly never really held much value.
What Is the 69 Percent Rule?
The Rule of 69 is a simple calculation to estimate the time needed for an investment to double if you know the interest rate and if the interest is compound. For example, if a real estate investor can earn twenty percent on an investment, they divide 69 by the 20 percent return and add 0.35 to the result. In this example, the double in value would require 3.8 years.
For simplicity’s sake, many investors use the 72 rule instead because you can leave off the .35. Instead, you divide 72 by the rate of return. For example, if the return is ten percent, the Rule of 72 would suggest that the value of the investment will double in 7.2 years.
Do These Rules Make Sense?
These calculations provide a simple back-of-the-envelope formula to forecast doubling time if you invest in something with a fixed return. However, real life doesn't always follow simple recipes. For example, since the Rule of 69 percent relies on compounding, it may not be accurate. That’s because a lower appreciation early in the forecast period will continue to hold down the total gains by reducing the denominator. Here’s an example:
Suppose that Joe buys a property and expects a 20 percent return. The Rule of 69 states that the investment would double in 3.8 years. However, if values drop initially, the investment needs to catch up before the compounding can start to increase the value, which will lengthen the timeline.
Appreciation Isn’t Guaranteed
Whether a real estate investment grows in value quickly, slowly, or not at all depends on factors not within the investor's control. Overall economic conditions like inflation and unemployment are significant, as are supply and demand. As with any investment, there is a risk that value will drop rather than increase. Investors should examine their risk tolerance and appetite when deciding whether to purchase a specific property. "Rules" can help as shortcuts for estimating possible growth but can't substitute for due diligence or guarantee outcomes.
This material is for general information and educational purposes only. Information is based on data gathered from what we believe are reliable sources. It is not guaranteed as to accuracy, does not purport to be complete and is not intended to be used as a primary basis for investment decisions. Examples are hypothetical and for illustrative purposes only. Withdrawal strategies should take into account the investment objectives, financial situation and particular needs of the individual.
FAQs
The Rule of 69 is a simple calculation to estimate the time needed for an investment to double if you know the interest rate and if the interest is compound. For example, if a real estate investor can earn twenty percent on an investment, they divide 69 by the 20 percent return and add 0.35 to the result.
What is the rule of 69 in investment? ›
The Rule of 69 tells you how long it takes to double your money with different returns. 🚀 The formula is simple: 69 divided by your investment's annual return rate.
What is the doubling rule of 69? ›
Rule of 69 is a general rule to estimate the time that is required to make the investment to be doubled, keeping the interest rate as a continuous compounding interest rate, i.e., the interest rate is compounding every moment.
What is the Rule of 72 and rule of 69? ›
The Rule of 72 states that by dividing 72 by the annual interest rate, you can estimate the number of years required for an investment to double. The Rule of 69.3 is a more accurate formula for higher interest rates and is calculated by dividing 69.3 by the interest rate.
What is the 70 rule investing? ›
Basically, the rule says real estate investors should pay no more than 70% of a property's after-repair value (ARV) minus the cost of the repairs necessary to renovate the home. The ARV of a property is the amount a home could sell for after flippers renovate it.
What does the rule of 69 predict? ›
It's used to calculate the doubling time or growth rate of investment or business metrics. This helps accountants to predict how long it will take for a value to double. The rule of 69 is simple: divide 69 by the growth rate percentage. It will then tell you how many periods it'll take for the value to double.
What is the number 1 rule investing? ›
Warren Buffett once said, “The first rule of an investment is don't lose [money]. And the second rule of an investment is don't forget the first rule.
What is the 69th rule? ›
The Rule of 69 is used to estimate the amount of time it will take for an investment to double, assuming continuously compounded interest. The calculation is to divide 69 by the rate of return for an investment and then add 0.35 to the result.
What is the rule of 67 in finance? ›
In an action in which any part of the relief sought is a judgment for a sum of money or the disposition of a sum of money or the disposition of any other thing capable of delivery, a party, upon notice to every other party, and by leave of court, may deposit with the court all or any part of such sum or thing.
What is the 70 percent rule for doubling time? ›
The Rule of 70 Formula
Hence, the doubling time is simply 70 divided by the constant annual growth rate. For instance, consider a quantity that grows consistently at 5% annually. According to the Rule of 70, it will take 14 years (70/5) for the quantity to double.
Expert-Verified Answer
It will take approximately 24.04 years for a $2,200 investment to increase to $10,000 with a compound annual interest rate of 6.5%.
How to double $2000 dollars in 24 hours? ›
The Best Ways To Double Money In 24 Hours
- Flip Stuff For Profit. ...
- Start A Retail Arbitrage Business. ...
- Invest In Real Estate. ...
- Play Games For Money. ...
- Invest In Dividend Stocks & ETFs. ...
- Use Crypto Interest Accounts. ...
- Start A Side Hustle. ...
- Invest In Your 401(k)
For example, the Rule of 72 states that $1 invested at an annual fixed interest rate of 10% would take 7.2 years ((72 ÷ 10) = 7.2) to grow to $2. In reality, a 10% investment will take 7.3 years to double (1.107.3 = 2).
What is the house flipper 70% rule? ›
Put simply, the 70 percent rule states that you shouldn't buy a distressed property for more than 70 percent of the home's after-repair value (ARV) — in other words, how much the house will likely sell for once fixed — minus the cost of repairs.
What is the 70 30 Buffett rule investing? ›
What Is a 70/30 Portfolio? A 70/30 portfolio is an investment portfolio where 70% of investment capital is allocated to stocks and 30% to fixed-income securities, primarily bonds. Any portfolio can be broken down into different percentages this way, such as 80/20 or 60/40.
What does the Rule of 72 tell you about your money? ›
Do you know the Rule of 72? It's an easy way to calculate just how long it's going to take for your money to double. Just take the number 72 and divide it by the interest rate you hope to earn. That number gives you the approximate number of years it will take for your investment to double.
What is the Rule of 72 in investment strategy? ›
How the Rule of 72 Works. For example, the Rule of 72 states that $1 invested at an annual fixed interest rate of 10% would take 7.2 years ((72 ÷ 10) = 7.2) to grow to $2. In reality, a 10% investment will take 7.3 years to double (1.107.3 = 2). The Rule of 72 is reasonably accurate for low rates of return.
What is the rule of 70 in stock options? ›
The rule of 70 calculates the years it takes for an investment to double in value. It is calculated by dividing the number 70 by the investment's growth rate. The calculation is commonly used to compare investments with different annual interest rates.
What are the 4 golden rules investing? ›
They are: (1) Use specialist products; (2) Diversify manager research risk; (3) Diversify investment styles; and, (4) Rebalance to asset mix policy. All boringly straightforward and logical.
